8-23
8-5 Periodic Maintenance
Troubleshooting
8
Replacing the Absolute Encoder Battery
Replace the Absolute Encoder Backup Battery if it has been used for more than three years or if an
absolute encoder system down error (alarm code 40) has occurred.
Replacement Battery Model and Specifications
Mounting the Backup Battery
Mounting the Battery for the First Time
Connect the absolute encoder battery to the Servomotor, and then set up the absolute encoder.
Refer to Absolute Encoder Setup on page 6-6.
Once the absolute encoder battery is attached, it is recommended that the control power supply be
turned ON and OFF once a day to refresh the battery.
If you neglect to refresh the battery, battery errors may occur due to voltage delay in the battery.
Replacing the Battery
If a battery alarm occurs, the absolute encoder battery must be replaced.
Replace the battery with the control power supply to the Servo Drive ON. If the battery is replaced
with the control power supply to the Servo Drive OFF, data held in the encoder will be lost.
Once the absolute encoder battery has been replaced, clear the battery alarm. For details on
clearing the alarm, refer to Alarm Reset on page 6-25.
Note If the absolute encoder is cleared, or the absolute values are cleared using communications,
all error and rotation data will be lost and the absolute encoder must be set up again. For
details, refer to Absolute Encoder Setup on page 6-6.
Item
Specifications
Name
Absolute Encoder Backup Battery
Model
R88A-BAT01G
Battery model
ER6V (Toshiba)
Battery voltage
3.6 V
Current capacity
2000 mA
·
h
ABS